battle theory

Before going into battle a soldier needs to prepare. To wear the proper armour and get hold of a shield and sword. The armour protects from harm as well as the sword kills the not so good guy. You also have to be fighting fit. It's the same if you battle against yourself. You need protection from dangerous illusions and also to be equipped with right knowledge and understanding. Therefore, when shooting in macro, it is easy to get a shallow depth of field if utilizing a large aperture. We often make use of the F8, F11, F13 such small, and medium-sized aperture to look at photograph to ensure the photo has clear range. If you use a 100mm macro lens to shoot the insects' close-up, even with the F13 aperture, the depth of field is extremely shallow, and sometimes need to utilize the manual focus function to carefully adjust the focus position to spotlight your eyes of insects to make the image more vivid.